CN105743629A - Signal sending method and device - Google Patents
Signal sending method and device Download PDFInfo
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- CN105743629A CN105743629A CN201610122094.9A CN201610122094A CN105743629A CN 105743629 A CN105743629 A CN 105743629A CN 201610122094 A CN201610122094 A CN 201610122094A CN 105743629 A CN105743629 A CN 105743629A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/542—Systems for transmission via power distribution lines the information being in digital form
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0204—Channel estimation of multiple channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
- H04L25/023—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- Engineering & Computer Science (AREA)
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The present invention discloses a signal sending method and device for increasing the accuracy degree of channel estimation of a receiving end, thereby increasing the accuracy degree of data decoding of the receiving end. The method is applied to a system in which a physical layer frame structure includes a preamble and a payload PL field, and the method includes: inserting, among OFDM time domain symbols in the PL field, one or more pilot-frequency time-domain symbols to obtain a physical layer frame; and sending, to the receiving end, the physical layer frame; wherein the preamble and the pilot-frequency time-domain symbols are used together to enable the receiving end to conduct channel estimation.
Description
Technical field
The present invention relates to technical field of data processing, particularly relate to signaling method and device.
Background technology
In power line communication, (English: system preamble), receiving terminal general preamble carries out frame synchronization, channel estimating etc. for physical layer frame structure comprises lead code.Wherein, preamble is made up of several OFDMs (English full name: orthogonalfrequencydivisionmultiplexing, english abbreviation: the OFDM) symbol that receiving terminal is known.
In order to transmit substantial amounts of information, in power line communication, it is long that the frame length of physical layer frame is arranged.Owing to power line communication channel has time variation, therefore, when frame length longer (being greater than 10 milliseconds of ms), receiving terminal carries out the result of channel estimating only according to preamble, the time variation of channel cannot be reflected, this can cause that the accuracy of receiving terminal channel estimating is relatively low, thus causing that the accuracy of data that receiving terminal decoding obtains is relatively low.
Summary of the invention
Embodiments of the invention provide signaling method and device, in order to improve the receiving terminal accuracy to channel estimating, thus improving the receiving terminal accuracy to the decoding of data.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that
First aspect, thering is provided a kind of signaling method, be applied in the system that physical layer frame structure includes lead code and load data PL field, described method includes: between the OFDM time-domain symbol in PL field, insert one or more pilot tone time-domain symbol, obtain physical layer frame；Described physical layer frame is sent to receiving terminal；Wherein, described lead code is used for making described receiving terminal carry out channel estimating together with described pilot tone time-domain symbol.
Second aspect, it is provided that a kind of sender unit, is applied in the system that physical layer frame structure includes lead code and load data PL field, and this device includes inserting unit and transmitting element；Insert unit, between the OFDM time-domain symbol in PL field, insert one or more pilot tone time-domain symbol, obtain physical layer frame；Transmitting element, for sending this physical layer frame to receiving terminal；Wherein, described lead code is used for making described receiving terminal carry out channel estimating together with described pilot tone time-domain symbol.
Example, pilot tone time-domain symbol can be the synchronizing symbol SynCP in described lead code, it is also possible to be transmitting terminal and other any one known symbols that receiving terminal is appointed.Optionally, length and the OFDM time-domain symbol at the protection interval of SynCP protect the length at interval equal.So, transmitting terminal can some resources of multiplexing, for instance, the form of the known frequency-region signal that Sender side Storage SynCP uses can multiplexing, thus saving certain resource.
In above-mentioned first aspect or second aspect, transmitting terminal can insert one or more pilot tone time-domain symbol between the two of arbitrary neighborhood OFDM time-domain symbol；And it is possible to insert one or more pilot tone time-domain symbol between two OFDM time-domain symbol that arbitrarily many groups are adjacent
In above-mentioned first aspect or second aspect, transmitting terminal by inserting pilot tone time-domain symbol between the OFDM time-domain symbol of the PL field of physical layer frame；Wherein, pilot tone time-domain symbol is used for making receiving terminal carry out channel estimating together with the premble in physical layer frame, so, when the frame length of physical layer frame is longer, compared with the technical scheme carrying out channel estimating merely with premble of the prior art, the change of channel can being followed the tracks of well, thus improving the accuracy of channel estimating, and then improving the receiving terminal accuracy to the decoding of data.
In above-mentioned first aspect, optionally, between the OFDM time-domain symbol in PL field, insert one or more pilot tone time-domain symbol, obtain physical layer frame, it is possible to including: in PL field between m OFDM time-domain symbol, insert n pilot tone time-domain symbol, obtain physical layer frame；Wherein, m >=1, n >=1, m and n is all integer.
Accordingly, in above-mentioned second aspect, optionally, insert unit specifically may be used for: in PL field between m OFDM time-domain symbol, insert n pilot tone time-domain symbol, obtain physical layer frame；Wherein, m >=1, n >=1, m and n is all integer.
Based on this optional implementation, for above-mentioned first aspect or second aspect, further alternative, described physical layer frame structure also includes frame control field；Described frame control field carries at least one in following information: whether physical layer frame inserts described pilot tone time-domain symbol, m, n etc..
In any one optional implementation of above-mentioned first aspect or first aspect, described in PL field between predetermined number OFDM time-domain symbol, insert one or more pilot tone time-domain symbol, before obtaining physical layer frame, the method can also include: the time-varying characteristics according to power line channel, determine at least one in following information: whether physical layer frame inserts pilot tone time-domain symbol, m, n etc..Accordingly, the device that second aspect provides can also comprise determining that unit, for the time-varying characteristics according to power line channel, it is determined that at least one in following information: whether insert pilot tone time-domain symbol, m, n etc. in physical layer frame.In such manner, it is possible to follow the tracks of the change of channel better, thus improving the accuracy of channel estimating, and then improve the receiving terminal accuracy to the decoding of data.
The third aspect, embodiments provides a kind of signal generating apparatus, and this device has the function realizing the method that above-mentioned first aspect provides.Described function can be realized by hardware, it is also possible to performs corresponding software by hardware and realizes.Described hardware or software include one or more module corresponding with above-mentioned functions.In a kind of possible implementation, the structure of this device includes processor and transceiver, and processor is configured to support corresponding function in the method that this device performs above-mentioned first aspect.Transceiver is used for supporting to communicate between this device and other equipment.This device can also include memorizer, and described memorizer is for coupling with processor, and it preserves programmed instruction necessary in this device and data.This device can be transmitting terminal,
Fourth aspect, embodiments provides a kind of storage medium, and for saving as computer software instructions used in the method for above-mentioned first aspect, it comprises the program that the everything for performing in above-mentioned first aspect is corresponding.
Accompanying drawing explanation
The schematic diagram of a kind of physical layer frame structure that Fig. 1 provides for the embodiment of the present invention；
The schematic flow sheet of a kind of signaling method that Fig. 2 provides for the embodiment of the present invention；
The structural representation of a kind of PL field that Fig. 3 provides for the embodiment of the present invention；
The structural representation of a kind of signal that Fig. 4 provides for the embodiment of the present invention；
The schematic diagram of the frequency selective fading of a kind of channel that Fig. 5 provides for the embodiment of the present invention；
The schematic diagram of the time domain selectivity decline of a kind of channel that Fig. 6 provides for the embodiment of the present invention；
The structural representation of a kind of sender unit that Fig. 7 provides for the embodiment of the present invention；
The structural representation of the another kind of sender unit that Fig. 8 provides for the embodiment of the present invention.
Detailed description of the invention
In the system that embodiment of the present invention technical scheme is applied in physical layer frame structure to comprise preamble, wherein, this physical layer frame structure can include but not limited to: the physical layer frame structure etc. specified in the physical layer frame structure of regulation, arrowband PRIME standard in the physical layer frame structure of regulation, arrowband G3 standard in broadband P 1901 standard.
The physical layer frame structure of regulation in the physical layer frame structure specified in broadband P 1901 standard and arrowband G3 standard, as shown in Figure 1.Wherein, frame structure shown in Fig. 1 is made up of 3 parts, respectively: preamble, frame control (English full name: framecontrol, english abbreviation: FC) field, load data (English full name: payload, english abbreviation: PL) field.Fc field is made up of the OFDM symbol of the control information carrying set form, receiving terminal can obtain the control information of PL field (such as after solving fc field, modulation system, coded system etc.), PL field can be decoded by receiving terminal according to the control information of PL field, thus parsing data.PL field is made up of several OFDM symbol, and namely what carry in these OFDM symbol is the transmitting terminal data that need to be sent to receiving terminal, i.e. data to be transmitted.
In broadband P 1901 standard and arrowband G3 standard, the physical layer frame structure of regulation is distinctive in that, bandwidth shared by preamble is different, synchronizing symbol (English full name: the synchronizationsymbol comprised in preamble, english abbreviation: SYNCP) and SYNCP is taken negative synchronizing symbol (English full name: synchronizationsymbol, english abbreviation: SYNCM) number different, sample rate is not equal.
In arrowband PRIME standard, the physical layer frame structure of regulation and the frame structure shown in Fig. 1 are distinctive in that, the fc field in Fig. 1 is (English: header) field referred to herein as head.
Below part term referred to herein is explained, reads to help reader:
" data " and " pilot tone " belong to the concept of same rank.Data are the effective informations (or be called useful information, or data to be transmitted etc.) that transmitting terminal is sent to receiving terminal, and data are known for transmitting terminal, are unknown for receiving terminal.Pilot tone is the information for carrying out channel estimating and synchronization that transmitting terminal is sent to receiving terminal, and pilot tone is known for transmitting terminal and receiving terminal.
" OFDM time-domain symbol " refers to the OFDM symbol on time-domain dimension, and " pilot tone time-domain symbol " refers to the frequency pilot sign on time-domain dimension." pilot sub-carrier " refers to that on this subcarrier, the information of carrying is all the subcarrier of pilot tone.
The executive agent of signaling method provided herein can be transmitting terminal.Transmitting terminal and receiving terminal herein may each be base station, access point (English full name: accesspoint, english abbreviation: AP) or subscriber equipment (English full name: userequipment, english abbreviation: UE) etc.." multiple " herein refer to two or more." channel " and " power line channel " herein represents same implication, and the two can be used with.
The technical scheme that the embodiment of the present invention provides, by inserting pilot tone time-domain symbol between the OFDM time-domain symbol in PL field, improves the receiving terminal accuracy to channel estimating, thus improving the accuracy of the data that receiving terminal decoding obtains.In particular, it is possible to solving when frame length is longer, receiving terminal is according only to the premble channel estimating made, in the coarse problem of channel estimation results that the PL stage causes because of channel variation.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out exemplary description.
As in figure 2 it is shown, be the schematic flow sheet of a kind of signaling method that the embodiment of the present invention provides.Method shown in Fig. 2 is applied in the system that physical layer frame structure includes premble and PL field, and wherein, the associated description about physical layer frame structure is referred to above.Method shown in Fig. 2 comprises the following steps S101-S102:
S101: between transmitting terminal OFDM time-domain symbol in PL field, insert one or more pilot tone time-domain symbol, obtain physical layer frame.
Wherein, PL field can comprise multiple OFDM time-domain symbol, the protection interval that this OFDM time-domain symbol is corresponding before each OFDM time-domain symbol, can be added with.The length (i.e. persistent period) of each OFDM time-domain symbol in PL field is equal, the length at the protection interval that different OFDM time-domain symbol are corresponding can equal can also be unequal.
The length of the pilot tone time-domain symbol inserted can be equal with the length of OFDM time-domain symbol, it is also possible to unequal.The specific implementation of the content of pilot tone is not defined by the embodiment of the present invention, as long as the content that its transmitting terminal is all known with receiving terminal.For pilot tone time-domain symbol, the subcarrier have data is mapped with pilot tone；When implementing, transmitting terminal can according to country variant, regional regulation or other the regulation not transmitting data on certain sub-carriers, and reasonably Choose for user has the subcarrier of data.Such as, in the frequency range that subcarrier number is 0～127, the subcarrier being mapped with data is subcarrier 0～29 and subcarrier 31～99, then, it is possible to pilot tone is also mapped on subcarrier 0～29 and subcarrier 31～99.
As it is shown on figure 3, the structural representation of the PL field in the physical layer frame obtained in S101.In figure 3, each column represents an OFDM symbol, and a circle in each column represents a subcarrier, and empty circles represents data subcarrier, and solid circles represents pilot sub-carrier.Wherein, Fig. 3 is, in time domain, to insert what a frequency pilot sign (that is: inserting a pilot tone time-domain symbol every 10 OFDM time-domain symbol) illustrated for example every 10 OFDM symbol.
Concrete, for a physical frame, transmitting terminal can insert one or more pilot tone time-domain symbol between the two of arbitrary neighborhood OFDM time-domain symbol, for instance, between OFDM time-domain symbol 5,6, insert a pilot tone time-domain symbol；And, one or more pilot tone time-domain symbol can be inserted between two OFDM time-domain symbol that arbitrarily many groups are adjacent, such as, a pilot tone time-domain symbol is inserted between OFDM time-domain symbol 5,6, and between OFDM time-domain symbol 10,11, insert b pilot tone time-domain symbol, wherein, a and b is all greater than or equal to the integer of 1, a and b can equal can also be unequal.If the pattern of the position at the description pilot tone place in a physical frame is called a pilot frequency design, then the pilot frequency design that different physical frames is corresponding can be the same or different.
S102: transmitting terminal sends this physical layer frame to receiving terminal；Wherein, premble is used for making receiving terminal carry out channel estimating together with pilot tone time-domain symbol.
Wherein, physical layer frame is by the process of transmitting terminal transmission to receiving terminal, it is possible to regard that this physical layer experienced by a generalized channel as.Receiving terminal needs this channel is carried out channel estimating, thus realizing the decoding to the data in PL field.
The method sending signal that the embodiment of the present invention provides, transmitting terminal by inserting pilot tone time-domain symbol between the OFDM time-domain symbol of the PL field of physical layer frame；Wherein, pilot tone time-domain symbol is used for making receiving terminal carry out channel estimating together with the premble in physical layer frame, so, when the frame length of physical layer frame is longer, compared with the technical scheme carrying out channel estimating merely with premble of the prior art, the change of channel can being followed the tracks of well, thus improving the accuracy of channel estimating, and then improving the receiving terminal accuracy to the decoding of data.
It should be noted that, signal structure as shown in Figure 4 disclosed in wireless network standards 802.11a, wherein, the transverse axis of Fig. 4 represents time domain, the longitudinal axis represents that frequency domain, each column represent an OFDM symbol, and each lattice represents a running time-frequency resource, each shade lattice represents the running time-frequency resource of a carrying pilot tone, and each blank lattice represents a running time-frequency resource of carrying data.The signal shown in Fig. 4 previously inserted 2 the pilot tone time-domain symbol of first OFDM time-domain symbol it is to be understood that insert multiple pilot sub-carrier on frequency domain, in time domain.In this technical scheme, each OFDM time-domain symbol all carries pilot tone, and the pilot number namely inserted is more.
But, actual when realizing, owing to power line channel is a kind of Periodic time-varying channel, frequency selectivity is very strong；Further, signal is rapid decay on frequency domain, and in time domain, change is slowly.As it is shown in figure 5, be the schematic diagram of the frequency selective fading of a kind of channel.Transverse axis in Fig. 5 represents frequency (unit: megahertz MHz), and the longitudinal axis represents the decay (unit: decibel dB) of channel.As shown in Figure 6, be a kind of channel time domain selectivity decline schematic diagram.Horizontal axis representing time (unit: millisecond ms) in Fig. 6, the longitudinal axis represents the average attenuation (unit: dB) of channel.Wherein, Fig. 6 illustrates for a cycle for 10ms, wherein in 10ms, can have a lot of OFDM symbol, for instance; if the length at the protection interval that the length of an OFDM time-domain symbol is corresponding is 50us (microsecond), then there are 200 OFDM time-domain symbol in 10ms.
In conjunction with Fig. 5 and Fig. 6 it can be seen that signal is decayed comparatively fast on frequency domain, therefore, on frequency domain, shown in Fig. 4, increase the technical scheme of pilot sub-carrier, the problem that frequency domain sample is not enough can be caused；It addition, signal changes slowly in time domain, therefore, each OFDM time-domain symbol all carries pilot tone, a part of pilot resources can be wasted.
The embodiment of the present invention is in time domain, insert several frequency pilot signs, namely inserts several time domain pilot symbols, therefore, compare the technical scheme all carrying pilot tone in each OFDM time-domain symbol shown in Fig. 4 and compare, it is possible to save certain pilot resources.It addition, it is apparent that compare the technical scheme shown in Fig. 4, the technical scheme that the embodiment of the present invention provides can also utilize less bandwidth to realize channel tracking, therefore, it is possible to save bandwidth resources.It addition, in the embodiment of the present invention, on frequency domain, a physical frame comprises more pilot tone, namely at frequency domain up-sampling comparatively dense；In time domain, a physical frame comprises less pilot tone, namely sparse at time domain up-sampling；So, compared with the method shown in Fig. 4, it is possible to better adapt to the time-varying characteristics of channel, therefore, it is possible to more effectively channel is sampled, thus following the tracks of the change of channel better.
Optionally, S101 may include that transmitting terminal in PL field between m OFDM time-domain symbol, insert n pilot tone time-domain symbol, obtain physical layer frame；Wherein, m and n is all greater than or equal to the integer of 1.Optionally, the method can also include: transmitting terminal is according to selectivity of channel frequency, it is determined that at least one in following information: whether inserts pilot tone time-domain symbol, m, n in physical layer frame.For example, it is possible to determine one or more in these information according to Fig. 5 and Fig. 6.
When implementing, transmitting terminal and receiving terminal to communicate, it is necessary first to consult how many, interval OFDM time-domain symbol and insert how many pilot tone time-domain symbol, and insert pilot tone time-domain symbol between which OFDM time-domain symbol.Concrete:
The value of m and n if mode one receiving-transmitting sides has been made an appointment, such as, m=8, n=1, then, transmitting terminal can carry the information of expression " whether inserting pilot tone time-domain symbol " in the frame control field (such as, fc field or header field) of physical frame.It is, for example possible to use 1 bit represents this information, if this bit is " 0 ", then represent and be not inserted into pilot tone time-domain symbol, if this bit is " 1 ", then it represents that insert pilot tone time-domain symbol, then receiving terminal can get pilot tone according to the value of m and the n made an appointment.
If the double; two value sending out the m that made an appointment of mode two transmitting-receiving, then transmitting terminal can at the frame control field at physical frame (such as, fc field or header field) in carry the information of expression " whether inserting pilot tone time-domain symbol " and the value of n.
If the double; two value sending out the n that made an appointment of mode three transmitting-receiving, then transmitting terminal can at the frame control field at physical frame (such as, fc field or header field) in carry the information of expression " whether inserting pilot tone time-domain symbol " and the value of m.
It should be noted that transmitting terminal all can carry in the frame control field of Physical Frame Structure to receiving terminal transmitted information in aforesaid way one to mode three, when implementing, it is not limited to this.It addition, frame control field can also carry the value these three information whether inserting pilot tone time-domain symbol, the value of m and n simultaneously, when implementing, it is not limited to this.
In the optional implementation of one, pilot tone time-domain symbol is the SynCP in lead code.Further alternative, the length at the length at the protection interval of SynCP and the protection interval of OFDM time-domain symbol is equal.The protection interval of OFDM time-domain symbol, it is possible to be: the Cyclic Prefix (English full name: cyclicprefix, english abbreviation: CP) of OFDM time-domain symbol.So, on implementing, transmitting terminal can some resources of multiplexing, for instance, the form of the known frequency-region signal that Sender side Storage SynCP uses can multiplexing, thus saving certain resource.
As it is shown in fig. 7, be the structural representation of a kind of sender unit that the embodiment of the present invention provides.Device 7 shown in Fig. 7 can be the transmitting terminal in the method shown in figure 2 above, this device 7 is in order to perform each step in the method shown in Fig. 2, this device 7 is applied in the system that physical layer frame structure includes lead code and load data PL field, and this device 7 includes: insert unit 701 and transmitting element 702.
Insert unit 701, between the OFDM time-domain symbol in PL field, insert one or more pilot tone time-domain symbol, obtain physical layer frame.
Transmitting element 702, for sending described physical layer frame to receiving terminal；Wherein, described lead code is used for making described receiving terminal carry out channel estimating together with described pilot tone time-domain symbol.
Optionally, insert unit 701 specifically may be used for: in PL field between m OFDM time-domain symbol, insert n pilot tone time-domain symbol, obtain physical layer frame；Wherein, m >=1, n >=1, m and n is all integer.
Optionally, described physical layer frame structure also includes frame control field；Described frame control field carries at least one in following information: whether described physical layer frame inserts described pilot tone time-domain symbol, described m, described n.
Optionally, as it is shown in fig. 7, device 7 can also comprise determining that unit 703, for the time-varying characteristics according to power line channel, it is determined that at least one in following information: whether insert described pilot tone time-domain symbol, described m, described n in described physical layer frame.
Optionally, described pilot tone time-domain symbol is the SynCP in described lead code, further alternative, and the length at the length at the protection interval of SynCP and the protection interval of OFDM time-domain symbol is equal.
On hardware realizes, above-mentioned transmitting element 702 can be transmitter, and additionally device 7 can also include receptor, and this receptor and this transmitter can integrate composition transceiver.Insert unit 701 and determine that unit 703 can be embedded in or in processor independent of device 7 in the form of hardware, it is also possible to being stored in the memorizer of device 7 in a software form, in order to processor calls and performs the operation that above modules is corresponding.
As shown in Figure 8, it is the structural representation of a kind of sender unit that provides of the embodiment of the present invention.Device 8 shown in Fig. 8 can be the transmitting terminal in the method shown in figure 2 above, this device 8 is in order to perform each step in the method shown in Fig. 2, device 8 includes: memorizer 801, processor 802, system bus 803 and communication interface 804, wherein, memorizer 801, processor 802 and communication interface 804 are coupled by system bus 803.Memorizer 801, is used for depositing program.Specifically, program can include program code, and described program code includes computer-managed instruction.Processor 802, for performing the program that described memorizer 801 is deposited, to realize the signaling method shown in figure 2 above.
Example, it is (English: volatilememory), for instance random access memory (English full name: random-accessmemory, english abbreviation: RAM) that memorizer herein can include volatile memory；Nonvolatile memory can also be included (English: non-volatilememory), such as read only memory (English full name: read-onlymemory, english abbreviation: ROM), flash memory is (English: flashmemory), hard disk (English full name: harddiskdrive, english abbreviation: HDD) or solid state hard disc (English full name: solid-statedrive, english abbreviation: SSD)；The combination of the memorizer of mentioned kind can also be included.
Processor can be central processing unit (English full name: centralprocessingunit, english abbreviation: CPU)；Can also be other general processors, digital signal processor (English full name: digitalsignalprocessing, english abbreviation: DSP), special IC (English full name: applicationspecificintegratedcircuit, english abbreviation: ASIC), field programmable gate array (English full name: field-programmablegatearray, english abbreviation: FPGA) or other PLDs, discrete gate or transistor logic, discrete hardware components etc..The processor etc. that general processor can be microprocessor or this processor can also be any routine.Can also being application specific processor, this application specific processor can include at least one in baseband processing chip, radio frequency processing chip etc..
System bus can include data/address bus, power bus, control bus and signal condition bus etc..In order to know explanation in the present embodiment, all various buses are all illustrated as system bus in fig. 8.
Communication interface can be transceiver.This transceiver can be wireless transceiver, for instance can be antenna etc..Processor is by carrying out the transmitting-receiving of data between communication interface and other equipment.
The present embodiment also provides for a kind of storage medium, and this storage medium can include memorizer 701.
The explanation of the related content in the device enforcement that the embodiment of the present invention provides is referred to above, and, the beneficial effect that the device 7 of the present embodiment offer and device 8 can reach is referred to the beneficial effect that the method shown in Fig. 2 provided above can reach, and repeats no more herein.
Those skilled in the art is it can be understood that arrive, for convenience and simplicity of description, the system of foregoing description, the specific works process of device and unit, it is possible to reference to the corresponding process in this preceding method embodiment, do not repeat them here.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method, it is possible to realize by another way.Such as, device embodiment described above is merely schematic, such as, the division of described unit, being only a kind of logic function to divide, actual can have other dividing mode when realizing, for instance multiple unit or assembly can in conjunction with or be desirably integrated into another system, or some features can ignore, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be through INDIRECT COUPLING or the communication connection of some interfaces, device or unit, it is possible to be electrical, machinery or other form.
The described unit illustrated as separating component can be or may not be physically separate, and the parts shown as unit can be or may not be physical location, namely may be located at a place, or can also be distributed on multiple NE.Some or all of unit therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme.
It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to be that the independent physics of unit includes, it is also possible to two or more unit are integrated in a unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, it would however also be possible to employ hardware adds the form of SFU software functional unit and realizes.
The above-mentioned integrated unit realized with the form of SFU software functional unit, it is possible to be stored in a computer read/write memory medium.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions with so that a computer equipment (can be personal computer, server, or the network equipment etc.) performs the part steps of method described in each embodiment of the present invention.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (12)
1. a signaling method, it is characterised in that being applied in the system that physical layer frame structure includes lead code and load data PL field, described method includes:
Between orthogonal frequency division multiplex OFDM time-domain symbol in PL field, insert one or more pilot tone time-domain symbol, obtain physical layer frame；
Described physical layer frame is sent to receiving terminal；Wherein, described lead code is used for making described receiving terminal carry out channel estimating together with described pilot tone time-domain symbol.
2. method according to claim 1, it is characterised in that between described OFDM time-domain symbol in PL field, insert one or more pilot tone time-domain symbol, obtain physical layer frame, including:
In PL field between m OFDM time-domain symbol, insert n pilot tone time-domain symbol, obtain physical layer frame；Wherein, m >=1, n >=1, m and n is all integer.
3. method according to claim 2, it is characterised in that also include frame control field in described physical layer frame structure；Described frame control field carries at least one in following information: whether described physical layer frame inserts described pilot tone time-domain symbol, described m, described n.
4. according to the method in claim 2 or 3, it is characterised in that described in PL field between predetermined number OFDM time-domain symbol, insert one or more pilot tone time-domain symbol, before obtaining physical layer frame, described method also includes:
Time-varying characteristics according to power line channel, it is determined that at least one in following information: whether insert described pilot tone time-domain symbol, described m, described n in described physical layer frame.
5. the method according to any one of claim 1-4, it is characterised in that described pilot tone time-domain symbol is the synchronizing symbol SynCP in described lead code.
6. method according to claim 5, it is characterised in that the length at the length at the protection interval of described SynCP and the protection interval of described OFDM time-domain symbol is equal.
7. a sender unit, it is characterised in that being applied in the system that physical layer frame structure includes lead code and load data PL field, described device includes:
Insert unit, between the orthogonal frequency division multiplex OFDM time-domain symbol in PL field, insert one or more pilot tone time-domain symbol, obtain physical layer frame；
Transmitting element, for sending described physical layer frame to receiving terminal；Wherein, described lead code is used for making described receiving terminal carry out channel estimating together with described pilot tone time-domain symbol.
8. device according to claim 7, it is characterised in that described insertion unit specifically for: in PL field between m OFDM time-domain symbol, insert n pilot tone time-domain symbol, obtain physical layer frame；Wherein, m >=1, n >=1, m and n is all integer.
9. device according to claim 8, it is characterised in that also include frame control field in described physical layer frame structure；Described frame control field carries at least one in following information: whether described physical layer frame inserts described pilot tone time-domain symbol, described m, described n.
10. device according to claim 8 or claim 9, it is characterized in that, described device also comprises determining that unit, for the time-varying characteristics according to power line channel, determine at least one in following information: whether described physical layer frame inserts described pilot tone time-domain symbol, described m, described n.
11. according to the device described in any one of claim 7-10, it is characterised in that described pilot tone time-domain symbol is the synchronizing symbol SynCP in described lead code.
12. device according to claim 11, it is characterised in that the length at the length at the protection interval of described SynCP and the protection interval of described OFDM time-domain symbol is equal.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610122094.9A CN105743629B (en) | 2016-03-03 | 2016-03-03 | Signaling method and device |
| EP16892368.8A EP3416326A4 (en) | 2016-03-03 | 2016-11-28 | Method and apparatus for sending signals |
| PCT/CN2016/107541 WO2017148190A1 (en) | 2016-03-03 | 2016-11-28 | Method and apparatus for sending signals |
| US16/121,331 US10505764B2 (en) | 2016-03-03 | 2018-09-04 | Signal sending method and apparatus |
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| CN201610122094.9A CN105743629B (en) | 2016-03-03 | 2016-03-03 | Signaling method and device |
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| CN105743629A true CN105743629A (en) | 2016-07-06 |
| CN105743629B CN105743629B (en) | 2019-07-19 |
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| US (1) | US10505764B2 (en) |
| EP (1) | EP3416326A4 (en) |
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| WO2022214079A1 (en) * | 2021-04-09 | 2022-10-13 | 华为技术有限公司 | Method and apparatus for transmitting physical layer control information |
| WO2024027467A1 (en) * | 2022-08-05 | 2024-02-08 | 华为技术有限公司 | Data transmission method and related product |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3416326A1 (en) | 2018-12-19 |
| US20180367344A1 (en) | 2018-12-20 |
| CN105743629B (en) | 2019-07-19 |
| EP3416326A4 (en) | 2019-02-20 |
| WO2017148190A1 (en) | 2017-09-08 |
| US10505764B2 (en) | 2019-12-10 |
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